1. QA/QC
Gaseous Pollutants mini-course
TAMS Center
February 2009

2. Quality Control Checks
Level One (zero/span)
Single Point (precision)
Multipoint (linearity)

3. As a general rule you want to check the calibration of any instrument throughout its expected measurement range. You create a test atmosphere of known concentration and challenge the analyzers.
0.090 ppm
(Precision)
(Single Point)
(Repeatability)
0.400 ppm
(span)
A multipoint adds at least 2 additional points evenly spaced throughout the instruments set range. For example: to the above add ppm & ppm. The analyzer response for each point must be within 2% of the best fit liner regression (linear trend line in spreadsheet).

4. Hint
Timing of Level 1 & Single Point verifications can increase data completeness

5. QA audits include NPAP and agency audits

9. Site
Log Book
QA & QC print outs
Manuals SOPs
Datalogger
Office
Log Book (daily call & comments on daily print outs)
Quarterly copy of field log book for data validation
Electronic versions (Level 1, Multipoint, Single point) Audit & NPAP Reports
Manuals SOPs
Database

12. In this exercise you will generate test atmospheres and perform zero/span checks, precision (single point) checks, calibrate the analyzer and do a multipoint check. Then we will discuss the results. Use the manual as a guide and use the supplied spreadsheets.